E75 on E85 tune?

MG0h3

Well-Known Member
Established Member
Joined
Jul 23, 2014
Messages
10,544
Location
El Paso, TX
So when I made the conversion my station had E85 in Jan. Thought I would test and see where I'm at this winter and I got E75. I know I'm actually richer but the octane may be a little lower. Should I get a tune adjustment? Car still runs awesome. @04sleeper
 

MG0h3

Well-Known Member
Established Member
Joined
Jul 23, 2014
Messages
10,544
Location
El Paso, TX
Ya doing some more research and it looks like E85 is 109octance and E70 is 105.
 

bb83

I like gays
Established Member
Joined
Jan 22, 2002
Messages
1,045
Even more so the listed octane and the actual is usually a little off....
 

04sleeper

Runs On "Liquid Gold"
Super Moderator
Joined
Sep 17, 2005
Messages
12,484
Location
Dallas, TX
E75 won't really hurt anything except the fuel trims may be a little off due to the Stoich being a hair higher. I can always send you an updated tune file for E75 to help fuel trims stay in line. Octane really doesn't start dropping off until around the E50 mark so you have PLENTY of Octane.

Shoot me a quick email and I'll send you an adjusted tune for E75.
 

NVRL8TE

Death or Glory
Established Member
Joined
Sep 27, 2012
Messages
2,200
Location
Cleveland, OH
Man. I wish I'd of known I was good on E75, on my E85 tune.

I was so scared, I put my car away a tad earlier than usual this year.
 

MG0h3

Well-Known Member
Established Member
Joined
Jul 23, 2014
Messages
10,544
Location
El Paso, TX
Thanks again Kevin!

Guessing I got all the 85 out and was down to just the winter E75. Noticed the car was starting a little harder--slightly extended crank. Opened the glove box and sure enough; WB showing @12:1 at idle.

Threw the E75 tune in. Fired up like stock and 14.64 at idle.
 

Users who are viewing this thread



Top